Harrow.



A. LARSON.

HARROW.

Patented Jan.'28, 1913.

ALBERT LARSON, orLArINn, OREGON.

HARROW.

Specification of Letters Patent.

Patented Jan. 28, 1913.

Application filed August 19, 1912. Serial No. 715,861.

To all whom :0 may concern:

Be it known that I, ALBERT Larson, a citizen of the United States, residing at Lapine, in the county of Crook and State of Oregon, have invented certain new and useful Improvements in Harrows, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to new and useful improvements in harrows, the object of the 'invcntion being to provide a harrow frame in which is mounted a plurality of drums having harrow teeth secured thereto and a cover hinged to one side of the frame and upon which the frame is mounted when it is desired to transport the frame from place to place upon runners which constitute a part of the cover structure.

Another object of the invention is to provide a harrow of the above character which will possess advantages in points of efliciency and durability, is inexpensive to manufac,

suitably connected at theirends to the ends of the transverse end pieces '2. Secured to the under side of one of the longitudinal edges of the side pieces 1 are the supporting strips 3 upon the upper face of which are mounted the bearings 4 and 4. Having its ends mounted in the bearings 4 is a roller 5 which is provided with a plurality of hubs (3 having radial outwardly extending portions 7 in which are mounted the inner ends of the cutting knives 8, said Hubs being held securely in placeupon the roller by means of the set screws 9. It will be readily apparent from the drawings that the hubs 6 are so arranged upon the roller that one half of the knife blades are curved toward one side of the frame whilethe other half of the knife blades are curved toward the opposite side of the frame, this arrangement other;

of the knives pulling the harrow teeth into the ground so as to thoroughly loosen the soil. Arranged in the frame at the rear of the roller 5 is another roller 10, the ends-of which are suitably mounted in the adjustable bearings 4'. Extending outwardly from the roller and having their ends suitably mounted therein are a plurality of radially projecting knives 11 which are arranged in rows upon the-Miter periphery of the roller, said rows being arranged iii a spiral line around the roller so that the outer ends of the knives will not come in contact with the outer ends of the knives 8 upon the roller 5.

Mounted in the adjustable bearings 4 and 10 are the spaced rollers 12 and 12- each being provided upon its outerperiphery with a plurality of radiallvprojecting teeth 13 which are arranged in the roller in alternate relation so that as the rollers revolve the teeth thereon will pass between each It will be noticed that the teeth 13 are pointed and are slightly curved so as to thoroughly pulverize the soil after the same has been'cut into small pieces by the knives S; and 11 and in this manner after the harrow has passed over the ground the soil will bg thoroughly pulverized. It will be readily apparent that the bearings 4' which are provided upon each side thereof with the elongated slots 14, can be readily adjusted so that the roller, 'nounted therein can be laterally adjusted u..'cordingto the character of the ground upon which the harrow is to be worked. If the ground is hard and in lumps, the rollers are to be arranged closer together so as to thoroughly pulverize the soil, but in case the ground is moist and easy to handle, the rollers can be "moved farther apart so that there will not be so much strain upor the draft animals.

Secured io the longitudinal side pieces by means of the members 15 is a suitable cover 16 adapter to be arranged over the upper side of the frame and upon which a suitable seat (not ;hown) for the driver may be located. Arranged in spaced parallel r ation upon the top of the cover are the meiallic runners 17 which, when the harrow is adapted (0 be transported from place to place will rest upon the ground, the harrow frame being mounted upon the cover so that the same may be easily transported. It will be understood that when the harrow is to he moved from place to place the cover and the arranged directly in the rear of the roller barrow are thrown over so that the rumiers 17 will rest upon the ground, the burrow frame being adaptedto rest upon the cover.

From the above description taken in connection with the accompanying drawings it will be readily apparent that I have provided a simple and durable harrow wherein the cutting teeth carried thereby are o arranged that any character of ground may be thoroughly pulverized and placed in condition for planting and the rollers. upon which the cuttingteeth are mounted may be laterally adjusted so as to adapt the harrow to various characters of ground.

\Vhile I have shown and described the preferred form of my invention it will be obvious that various changes in the details of construction and in the proportions may be resorted to for successively carryin my invention into practice Without sacriicing any of the novel features or departing from the scope of the appended claims.

\Vhat I claim is I. In a device of the character described, the combination of a frame, rollers rotatably mounted Within said frame, a plurality of hubs mounted upon one of said rollers, a plurality of curved cutting blades mounted upon said hubs, a second roller mounted in the frame and in the rear of the first roller,

said second roller being provided with a plurality of cutting knives arranged in Qrows, said rows being arranged in a spiral line around the outer periphery of the roller, rollers mounted in the frameand arranged adjacent the second roller, and teeth alternately arranged in the outer periphery of the last mentioned rollers.

2. In a device of the character described,

the combination of a frame, rollers rotatably mounted within said frame, hubs mounted upon one of said rollers, radially projecting cutting knives mounted in said hubs, one half of the knives mounted upon said roller being curved toward one side of the frame and the other half of the knives mounted upon said roller being curved toward the other side of the frame, a second roller arranged in the rear of the first roller, cutting knives arranged in rows upon the outer periphery of said roller, said rows being arranged in a spiral line around said roller, rollers mounted in the rear of the second roller and arranged in spaced relation, and a plurality of teeth alternately an ranged in the outer periphery of the last mentioned rollers. r

In testimony whereof I hereunto .aflix my signature in the presence of two witnesses.

ALBERT LARSON.

Witnesses:

E. R. HILL, FAYE B. HILL.

Copies of this patent may be obtained'for five cents each, by addressing the Commissioner 0!. Patents,

Washington, D. 0. 

